[PATCH/RFC] spi: sh-msiof: Add runtime PM lock in initializing

[Yoshihiro Kaneko <ykaneko0929-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

From: Hisashi Nakamura <hisashi.nakamura.ak-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

SH-MSIOF driver is enabled autosuspend API of spi framework.
But autosuspend framework doesn't work during initializing.
So runtime PM lock is added in SH-MSIOF driver initializing.

Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---

This patch is based on the for-next branch of Mark Brown's spi tree.

 drivers/spi/spi-sh-msiof.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 3f36540..1405293 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -480,6 +480,8 @@ static int sh_msiof_spi_setup(struct spi_device *spi)
 	struct device_node	*np = spi->master->dev.of_node;
 	struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master);
 
+	pm_runtime_get_sync(&p->pdev->dev);
+
 	if (!np) {
 		/*
 		 * Use spi->controller_data for CS (same strategy as spi_gpio),
@@ -498,6 +500,9 @@ static int sh_msiof_spi_setup(struct spi_device *spi)
 	if (spi->cs_gpio >= 0)
 		gpio_set_value(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
 
+
+	pm_runtime_put_sync(&p->pdev->dev);
+
 	return 0;
 }
 
-- 
1.9.1

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